New plugs making car run lean?
Jun 28, 2006 | 02:50 PM
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From: Oak Creek, WI
New plugs making car run lean?
I change my plugs about every 5-6k since I use the NGK copper plugs. I went from a BPR7ES to a BR8ES. Ever since then I have been battling a lean start-up 18.7-20.0, but if I drive the car around for about a minute or two the afr is stable at 14.7-15.0. Plugs are gapped to .28 with the HKS DLI II. On the 7's I had the same gap and never had a problem.
Could it just be the plugs are warming up during that time or the excess fuel being dumped in at start-up? Or I went from a protruding head to a non.
My guess is that it is the plugs because of the higher combustion point in the cylinder.
Could it just be the plugs are warming up during that time or the excess fuel being dumped in at start-up? Or I went from a protruding head to a non.
My guess is that it is the plugs because of the higher combustion point in the cylinder.
